10961815280 has 40 divisors (see below), whose sum is σ = 27446701632. Its totient is φ = 4047439104.

The previous prime is 10961815279. The next prime is 10961815343. The reversal of 10961815280 is 8251816901.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×10961815280² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5269064 + ... + 5271143.

Almost surely, 2^10961815280 is an apocalyptic number.

10961815280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10961815280 is an abundant number, since it is smaller than the sum of its proper divisors (16484886352).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10961815280 is a wasteful number, since it uses less digits than its factorization.

10961815280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10540233 (or 10540227 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 41.

The spelling of 10961815280 in words is "ten billion, nine hundred sixty-one million, eight hundred fifteen thousand, two hundred eighty".